Lathe



part hereof.

Patented Aug. 16', 1927.

.IoIIN n. JoIINsoN, or CHICAGO, ILLINOIS.

Lacuna.

Application filed December 18, 1922. Serial No. 607,659.

rIlhis inventionv relates to that class,- oflathes having a bed and track, or comprising a pair of parallel tracks disposed at. an angle with respect to each other and adapted to support a head stock, a tail Istock, a slide rest oi carriage and an auxiliary tool support or rest in operative position. Y

The principal ob'ectofthe invention is to provide a simple, economical and eilicient lathe.

A further object ofthe invention is to provide a lathe having a bed and track, or two part bed, comprising a.l pair of parallel tracks or beds. disposed at an angle with respect to each other and adapted to support a head stock and tailv stock and the usual slide rest or carriage and an auxiliary tool support or rest in operative'position and in ad-V justable relation to each other. @ther and further objects of the invention will appear from the following description and claims, and from an inspection of the accompanying drawings which are made a The invention consists in the features, combinations, arrangements of parts, and details of construction herein described and claimed.V .i f f,

In the accompanying drawings, Figure l is a view in side elevationof ya lathe constructed inv accordance with my in-V vention, with the lower part of the frame or legs omitted or broken'away; Y

F ig. 2 is a view in transverse Vertical sec-` tion taken on line 2--2` of Fig. l, looking in the direction indicatedl by the? arrows andshowing the twopart` lathe bed ormain and auxiliary beds -or tracks .in section, and with the head stock and tlieusual slide rest or carriage mounted thereony and an auxiliary tool supportor iest slidably or adjustably and detachably mounted upon the upper rear auxiliary lat-he bed or track; and Y Fig. 3 is a detail view in rearelevation taken on line 3 3, of Fig. 2, looking in the direction indicated by the arrows, and showing an upper or. auxiliaryl tool support mounted upon the upper rear or auxiliary lathe bed or track, and mechanism for operating or moving and holding the tools upon the auxiliary tool support or head in operative position with respect to the work.

In constructing' an improved lathe in ac-vr cordance with my invention, I ,provide a lathe bed l, comprising a forward lower horizontal main lathe bed or track 2, vand a rear upper auxiliary lathey bed vor track 3 located above the.y levelof and rearward ,with respect to said main lathebed or track 2.;

rllhe lower forward or main lathe. bed-or track 2and.the upperrear auxiliary lathe b cd or track 3Ak are arranged in `parallel irelatioirto each other. And the upper forward surface et oftheauxiliary bed or track 3 is inclined and extends upward and rearward at an'oblique angle with respectto the horizontaltop surface or surfaces 5 of the main orforward lower lathe bed or track 2.. The upper rear or auxiliary lathe bed or track 3 has `a bottom horizontal marginal guiding face 6, whichv is above the level of/and in a horizontal plane parallel tothe upper horizontal Vface 5 of the forward or lower main lathe bed 2. A space 7 is thus provided between lthe opposed faces 5 and 6 adapted to permita head stock 8, a tail stock 9, a sliderest or carriage :10 of any desired ordinary form, and an upper or auxiliary tool support .Y

ortool-supporting rest 1-1 to be slidably supported in operative position,and in adjustable-or movable relation toeach other.V f

AThe upperrear orauxiliarylathe bed or track3 is' also providedwitli an upper hori-4 zontal :marginal .guiding Isurface 12, which is in parallel relation to the opposite, bottom marginal guiding `surface 6, already .de-

scribed. In other words, the top surface or surfaces 5 of the main lower lor horizontal lathe bed 2, and the horizontal marginal. guidingsurfaces 6 and 12 ,of the upper rear or auxiliary-.lathe bed or .track 3 are in three different horizontal planes, and the upwardly and rearwardly yinclinedv forward guiding face 44 of the yupper rear'or auxiliary lathe bed orftrack is atan oblique angle to the plane of said parallel horizontal faces; and the guiding edges 13 and 14 of the lower or 1main lathe bed 2 and guiding edges or surfaces-15 and 16.*of the upperrear or` auxiliary lathe bed oi' track 3 are all in parallel relation Vto each other-and adapted to accurately guide .tliehead stockv 8,tail stock 9,Y lower slide restnor tool-supporting carriage 10, and upper rear or auxiliary tool support or rest 1l, in their respective parallel paths -of movementfrom one adjusted position to another, as desired.

The upperzrear orauxiliary track. orbed 3 is also provided with a rear upwardlyfand forwardly extending rearwardly facing inclined tace 16, having a central longitudinal slot 17 which extends from end to end thereof. The tace 16 may be of any desired length and is adapted to support in operative position an auxiliary tool positioning, or operative mechanism or device 18, whenever suoli a mechanism is to be employed in connection with the auxiliary tool support or rest l1, or a tool or tools to be supported thereby.

In the form of the device shown in the accompanying drawings, the head stock 8 and tail stock 9 are shown slidably mounted upon the upper rear or auxiliary lathe bed or track 3; and the slide rest lO-which may be of any ordinary and well known or desired form ot slide rest or tool supportino' carriage such as is in common use and well known in the art,-is mounted in the usual manner upon the lower horizontal or main lathe bed or track 2, and is adapted to be operated by means oiE a toed screw-not shown-or other suitable ordinary and well known operating means.

The upper rear or auxiliary bed or track 3 has a longitudinal slot 19 which extends from end to end thereof and is adapted to receive headed securing bolts 2O anchored in the base or bracket portion 25 ot the upper auxiliary tool support or rest 11, for holding the latter in operative position in any adjusted position into which it may be moved lengthwise of the track 3. rThe slot 19 is also adapted to receive and hold in any desired adjusted position headed securing bolts 21 anchored in the base of the head stock 8 and thereby securely hold the head stock in any operative position into which it is adapted to be adjusted. rlllie slot 19 is also adapted to admit headed securing bolts 22 anchored in the tail stock 9 and hold the tail stock in operative position in any adjusted position into which it is adapted to be moved.

lt should be noted that by mounting the head stock 8, tail stock 9, slide rest or carriage l0, and upper rear supplementary tool support or rest 11 in slidable or adjustable engagementwith the tracks 2 and 3, respectively, in the manner in which they are shown in the drawings, the slide rest 1() and tail stock 9 may be moved past each other in either direction longitudinally of the bed or lathe to any desired position with respect to each other and to any desired position with respect to the head stock. And the lower slide rest or carriage 10 and upper rear or auxiliary tool support or rest 11, with the tool or tools thereon, may be moved past each other in either direction longitudinally of the bed or tracks upon which they are slidably mounted, and are adapted to be securely held in any desired adjusted position and with the tools in position to engage and operate upon the work.

wintegral with the lower or main bed or track 2 and the upper auxiliary track 3. And the rear grooved face or track portion 16 is also, by preference, integral with the back trame 23.

ln the form shown in the accompanying Yd-.rawings the upper or auxiliary tool support Yl1 comprises in its construction a'supporting bracket or bed 25 in which headed screw bolts 20 are mounted, the heads of said bolts being mounted in and in adjustable vor slidable engagement with the retaining wall.; ot the longitudinal slot 19 in the auxiliary or upper rear track 3, already described. TJpon and in vfixed relation to and, by preference, integral with the supportingbracket is a base plate or rest 26, having` longitudinal projecting side margins or: guiding flanges 27. And a sliding or adjustable toolsupporting plate or head 28 is slidably mounted upon the inclined upper face 29 of the supporting bracket member or base plate This movable tool-supporting plate or hean 28 is provided with upper sidemarginal flanges 30 and lower side marginal llanges 3l formed integral with the central itat main b ody portion of said plate 28 and projecting upward and downward on opposite sides ot the ianged base plate or rest Q6. Bottom guiding plates or flanges 32 are secured in iixed relation to and may be integral with the bottom margins of the longitudinal side flanges 31, 31 of the sliding plate 28. Depending securing screws 33, anchored in the ianges 31 and having their depending heads in supporting engagement with the bottom sides ot the guiding` or retaining flanges 32, serve to detachably hold the latter in operative position. A top retaining plate 34 is rigidlyV secured to the upper side flanges 30, 30 of the plate 28 by means of headed bolts 35, or other suitable securingmeans. rl`he top plate 34 thus extends acro-ss and, by preference, covers the plate 28,`and is spaced apart trom the central main body portion of the flanged plate 28 a suiiicient distance to provide a space 351 Y between the inner bottom face of the plate 24 and the top face of the plate 28 adapted to receive and hold inrigid operative position a tool or tools 241 mounted in said space.

Set screws 36 are mounted in threaded engagement with the top plate 34 and with their inner ends in securing engagement with the adjacent faces ot corresponding` tools 24. The tools 24 are thus rigidly held in operative position between the inner or main sliding plate 28 and the top tool retaining plate 34, said retaining plates torming a sliding tool support or head, whichv is movable on and in sliding engagement with ther flanged base-plate or rest 26.

From the foregoing it will be readily seen that the tool-supporting head or frame-comprising the sliding flanged tool-supporting plate 28 and top tool retaining plate 34 and bottom guiding flanges 32 are rigidly connected-v-is slidably mounted upon the base plate or rest 26 on the supporting bracket 25 which is rigidly mounted on the track 3 in any desired adjusted position. The bracket or base 25 has a. rearwardly projecting bracket arm 37, in which is pivotally supported a tool actuating ever 38, which is provided with a supporting pin or axle 39, the opoci e ends of said axle 39 being mounted in forked ends of the rear bracket arm 37 et-ween which said operating Vlever extends. The upper end of the tool actuating lever 38 is operatively connected with the intermediate flanged tool-supporting plate or head 28, by means of a connecting link 40, one end of which is pivotally connected with the tool-supporting head or plate 28 by means of a pivot pin'41, and the opposite end of which is pivotally connected with the lever 38 by means of a pivot pin 42. rlhe upper or auxiliary tool-support or re't ll, as a whole, is thus adapted to support a tool or tools 24 in position to engage any material or work supported between the head-stock and tail stock, and the tool-supporting head or frame thus formed by the rigidly connected plates 28 and 34 is movable on the base 26 by means of the leiter 38. y

Suitable means is provided for actuating the tool-operating lever 38, and thereby operating or adjusting the tool or tools 24 and supporting 'the same in any desired operative position with respect to the work.

In the form of the device shown in the drawings, the operating lever 38 is provided with lower forked arms 43, each of which is provided with an antifriotionv roller 44 upon its lower end. A shaft 45 is journaled at its opposite ends in suitable supporting brackets 46, which are mounted upon the face 16 of the back frame 23, or back portion of the track 3. The brackets 46 may be adjustably orotherwise secured to said back frame 23 or back portion of the track 3 by means of headed bolts 47 which are anchored in the supporting brackets 46 and have their headed ends in slidable or adjustable engagement with the retaining walls of the slot 17, already described.

An eccentric or cam 48 is fixed to the rotary shaft 45 and has its peripheral or cam surface between and in operative engagement with the antifriction rollers 44, 44 on the forked arms 43 of the lever 38. Suitable means for actuating the rotary shaft 45 is provided, which may consist of a worm wheel 49, fixed to the shaft 45, a worm 50 mounted in suitable bearings 51, 51, and in toothed engagement with the worm wheelv 49, .and an operating wheel or belt pulley 52 mounted upon and adapted to be operatively connected with and disconnected from the worm shaft 53, by means of a clutch 54, which may be of any ordinary and wel] known or suit-- able form.

A clutch operating lever 55 is mounted in operative engagement with the movable clutch member 56, and is adapted to operatively connect the pulley wheel 52 with the worm shaft 53, and to disconnect said pulley wheel and shaft, when desired, by throwing the movable clutch member into and out of clutching engagement with its mating clutch member on the driving wheel 52.

From the foregoing it will be readily un-V derstood by those skilled in the art', that the upper or auxiliary tool support or rest 11, with its supporting bracket 25 is adapted to be moved longitudinally of the upper or auxiliary track 3 to any desired adjusted position. And the slida'ble tool-supporting head formed by the rigidly :connected plates. 28, 34, of the rest ll is,y adapted to be actuated by the operation of the forked tool-operating lever 38, so as to move and support the tools 24 in operative position and in engagement with the work in whatever position the tool support or auxiliary ,Egt 1l may be adjusted.

'2 and an upper auxiliary bed or track 3,

constructed and arranged as above described, is adapted to enable lious forms of auX- iliary tool supports or rests, or tool-supporting and actuating means such, for example as lthe support ll, to be mounted upon and supported in operative position, and adjusted with respect to the rear upper or auxiliary lathe bed or track 3, a'nd in any desired operative position with respect to the work.

I claim:

l. In a lathe, the combination of a lower front lathe bed, an upper track located above the level of and rearward with respect to the lower front lathe bed and having an upwardly and rearwardly inclined guiding surface disposed at an oblique angle with respect to the top face of the lower front lathe bed, a head stock, a tailstock mounted in position to extend over the lower front lathe bed, a tool support movabiy mounted on said upper track and in sliding engagement with said inclined guiding surface, and means for actuating a tool mounted on saidk movable tool support, said tool-actuating means comprising a lever pivotally mounted on said tool support and having forked arms the ends of which are spaced apart, a cam rotatively mounted between and in operative engagement with said forked loo" arms and adapted to reciprocate said lever, and means for operating said cam.

2. ln a lathe, the combination of a lower iront lathe bed, an upper track in parallel relation to and located above the level of and rearwardly with respect to the lower front lathe bed, said upper track having an inclined guiding surface disposed at an oblique angle to the top tace of the lower liront lathe bed, a head stock, a tail stock mounted on said upper track in sliding en vgagement with said inclined guiding sura'ce and in movable relation to and extending over the lower front lathe bed, a toolsupporting carriage movable on the lower front lathe bed, an auxiliary tool support mounted on and in slidable engagement with the upper track, said auxiliary tool support comprising a base, a slidable tool supporting hea'd mounted in slidable engagement with said base, m'eans for securing a tool in operative position on said head, and actuating means for operating said slid-able tool supporting head, said actuating means compris ing` a lever pivota'lly mounted on said hase and connected with said head and having forked lever arms the ends of which are spaced apart, a cain rotatively mounted loetween and in operative engagement with said forked arms7 tor reciprocating said lever, and means 'for operating said cam.

3. In a lathe, the combination ot' a lower front lathe bed, an upper track in parallel relation to and located rearward and above the level of said lower front lathe bed7 said upper track having an upwardly and rearwardly inclined guiding surface disposed at an oblique angle to the top iace of sa'id lower front lathe bed, a head stock, a tail stock mounted in position to extend over the lower front lathe bed, a tool-supporting rest movable upon the upper track, a tool-supporting member movable upon said movable trackengaging rest, and means for actuating said movable tool-supporting member upon said rest in any position in which the latter may be located on said upper track, said actuating means comprising a' pivoted lever operatively connected with said movable tool-supporting member, and having forked arms the ends ot which are spaced apart, a cam rotatively mounted between and in operative engagement with said forked arms, for reciprocating said lever, a'. rotative shaft upon which said cam is mounted, and gear mechanism operatively connected with said shaft and adapted to rotate the same.

Ll. ln a lathe, the combination of a lower front lathe bed, an upper track in parallel relation to and located rearwardly and above the level of said lower lathe bed, said upper' track haviing` a' 4liront guiding surface eX- tending upward and rearward at an incline above the level of the front lathe bed, a rear guiding surface on said upper track and extending downwardly and rearwardly at an incline back ot said upwardly and rearwardly extending inclined guiding surface,

a head stock, a tail stock mounted on saidV upper track and extending over the lower Yiront lathe bed, a tool-supporting rest mounted on said upper track, and toolactuating means mounted on said rear downwardly and rearwardly extending` inclined guiding surface and adapted to'actuate a tool mounted on said tool-supporting rest.

Signed at Chicago, in the county of Cook and State ot Illinois, this 15th day of December, 1922.

Y JOHN E. JOHNSON. 

